Prohibit nul-separated glob pattern [Feature #14643] (#2419)

NEWS

@@ -79,6 +79,13 @@ Complex::
 
     * Added Complex#<=>. So 0 <=> 0i will not raise NoMethodError. [Bug #15857]
 
+Dir::
+
+  Modified method::
+
+    * Dir#glob and Dir#[] no longer allow NUL-separated glob pattern.
+      Use Array instead.  [Feature #14643]
+
 Encoding::
 
   * Added new encoding CESU-8 [Feature #15931]

dir.c

@@ -2694,41 +2694,24 @@ push_glob(VALUE ary, VALUE str, VALUE base, int flags)
 static VALUE
 rb_push_glob(VALUE str, VALUE base, int flags) /* '\0' is delimiter */
 {
-    long offset = 0;
-    long len;
     VALUE ary;
-    int warned = FALSE;
+    int status;
 
     /* can contain null bytes as separators */
-    if (!RB_TYPE_P((str), T_STRING)) {
+    if (!RB_TYPE_P(str, T_STRING)) {
 	FilePathValue(str);
     }
+    else if (!rb_str_to_cstr(str)) {
+        rb_raise(rb_eArgError, "nul-separated glob pattern is deprecated");
+    }
     else {
 	rb_check_safe_obj(str);
 	rb_enc_check(str, rb_enc_from_encoding(rb_usascii_encoding()));
     }
     ary = rb_ary_new();
 
-    while (offset < (len = RSTRING_LEN(str))) {
-	int status;
-        long rest = len - offset;
-        const char *pbeg = RSTRING_PTR(str), *p = pbeg + offset;
-        const char *pend = memchr(p, '\0', rest);
-        if (pend) {
-            if (!warned) {
-                rb_warn("use glob patterns list instead of nul-separated patterns");
-                warned = TRUE;
-            }
-            rest = ++pend - p;
-            offset = pend - pbeg;
-        }
-        else {
-            offset = len;
-        }
-	status = push_glob(ary, rb_str_subseq(str, p-pbeg, rest),
-			   base, flags);
-	if (status) GLOB_JUMP_TAG(status);
-    }
+    status = push_glob(ary, str, base, flags);
+    if (status) GLOB_JUMP_TAG(status);
 
     return ary;
 }

spec/ruby/core/dir/shared/glob.rb

@@ -30,7 +30,7 @@ describe :dir_glob, shared: true do
     end
   end
 
-  ruby_version_is "2.6" do
+  ruby_version_is "2.6"..."2.7" do
     it "splits the string on \\0 if there is only one string given and warns" do
       -> {
         Dir.send(@method, "file_o*\0file_t*").should ==
@@ -39,6 +39,12 @@ describe :dir_glob, shared: true do
     end
   end
 
+  ruby_version_is "2.7" do
+    it "raises an ArgumentError if the string contains \\0" do
+      -> {Dir.send(@method, "file_o*\0file_t*")}.should raise_error ArgumentError, /nul-separated/
+    end
+  end
+
   it "matches non-dotfiles with '*'" do
     expected = %w[
       brace

test/ruby/test_dir.rb

@@ -138,9 +138,8 @@ class TestDir < Test::Unit::TestCase
                  Dir.glob(File.join(@root, "*"), File::FNM_DOTMATCH).sort)
     assert_equal([@root] + ("a".."z").map {|f| File.join(@root, f) }.sort,
                  Dir.glob([@root, File.join(@root, "*")]).sort)
-    assert_warning(/nul-separated patterns/) do
-      assert_equal([@root] + ("a".."z").map {|f| File.join(@root, f) }.sort,
-                   Dir.glob(@root + "\0\0\0" + File.join(@root, "*")).sort)
+    assert_raise_with_message(ArgumentError, /nul-separated/) do
+      Dir.glob(@root + "\0\0\0" + File.join(@root, "*"))
     end
 
     assert_equal(("a".."z").step(2).map {|f| File.join(File.join(@root, f), "") }.sort,